The phrase "big babies" can often be used to describe someone who is behaving immaturely or overly sensitive. If you're looking for a more sophisticated way to convey this meaning, you could use synonyms like "immature adults," "childish individuals," or "oversensitive souls." Another option could be "emotional wrecks," "whiny individuals," or "dramatic types." These synonyms can help you express the same idea in a more elegant or nuanced way, which may be helpful in professional or academic settings. Regardless of the phrase you choose, try to use language that is respectful and considerate of others.